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Blog

Your Data Deserves Better: Understanding When to Use EFA or PCA

Psychometrics
Statistics

If you’ve ever opened SPSS -> Dimensionality Reduction -> Factor and wondered whether to click “Principal Axis Factoring” (aka EFA) or “Principal Components,” (aka PCA) you’re not alone. These two methods sit side-by-side, look almost identical, and are often mixed up—even in published research. But they serve very different purposes, especially when we’re trying to understand psychological constructs. In this post, I’ll walk you through what those differences are and why they matter.

Apr 14, 2025
Md Allama Ikbal Sijan

I-O Psychology Career Resource Guide

Job Search
Career

Navigating a career in Industrial-Organizational Psychology can feel overwhelming, but the right resources can make all the difference. This guide provides a comprehensive overview of career paths, job search strategies, hiring companies, and application tips to help students confidently transition into the workforce.

Mar 10, 2025
Md Allama Ikbal Sijan

What Are Data Structures? A Simple Introduction for Beginners

Data Science
Programming

Learn what data structures are, why they matter, and how they can improve the efficiency of your code. This blog introduces key concepts in an easy-to-understand way for those just starting their coding journey.

Dec 20, 2024
Md Allama Ikbal Sijan

From Text to Predictions: Using LLMs for NLP Tasks

LLM
NLP

This blog post walks you through using the transformers library to import pre-trained large language models (LLM) and its tokenizer. You’ll learn how to tokenize text, extract word embeddings from different hidden layers, and use these embeddings in machine learning models for prediction.

May 21, 2024
Md Allama Ikbal Sijan

Making Training Stick: Insights from a Meta-Analysis on Training Transfer

Training

Transfer of training is a major challenge for organizations. Drawing on a seminal meta-analysis (Blume et al., 2010), this blog explores key factors that contribute to effective training transfer, providing insights to bridge the gap between training and on-the-job performance.

Mar 13, 2024
Md Allama Ikbal Sijan

R You Ready? An I/O Psychologist’s Guide to R & Rstudio

R
Workshop

My January 16, 2024 METRO workshop is now a blog post, covering the essential 20% of R syntax for 80% of data analysis tasks. This blog post is designed for both R beginners and those seeking a refresher.

Jan 15, 2024
Md Allama Ikbal Sijan
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